Shuttle box front



22, 1939- H. J. LANIER SHUTTLE BOX FRONT.

Filed Feb. 21, 1938 gy'wm: HENRY JON S LAN/Ea Patented Aug. 22, 1939 PATENT OFFICE SHUTTLE BOX FRONT Henry Jones Lanier, Langdale, Ala., assignor to Draper Corporation, Hopedale, Mass, a corporation of Maine Application February 21, 1938, Serial No. 191,741

4 Claims.

This invention relates to a box front for shuttle boxes of looms in which a thread cutter is employed for clamping and cutting the thread on a bobbin as it is being. expelled from the shuttle during a replenishing operation.

Thread cutters of this type have universally withdrawn the severed and clamped thread, over the top of the box front and thus the thread has become stretched in such withdrawing operation, resulting in defective cloth woven in the loom.

The invention is capable of being used in lieu of the box front shown in Patent No. 1,727,315 of September 3, 1929. In structures of this type heretofore used, it is a custom, and in fact due to the structure of the box front it is necessary,

to withdraw the clamped thread from the exhausted bobbin or filling carrier over the top of the box front. The selvedge of the cloth is located in a horizontal plane just above the race plate of the lay and therefore it is seen that in withdrawing the thread fro-m the exhausted bobbin over the top of the box front it is stretched considerably. 7

It is an object of this invention to provide a box front for shuttle boxes adapted to be used in connection with thread cutters and in which the anchoring member of the box front is disposed at the top of the box front and a downwardly extending slot is provided extending from the point p where the thread cutter goes through the box front to the inner end of the box'front, thus permitting the end which is clamped and cut from the departingfilling carrier to be withdrawn and held in such a manner as to eliminate any stretching whatever on this thread.

It is well known in the art that the purpose in such thread cutters is to engage the end of the thread from a departing filling carrier and to prevent the shuttle, on account of friction between the inner surface of the box front and the shuttle, from carrying the loose ends back into the cloth, resulting in defective goods.

Some of the objects of the invention having M been stated, other objects will appear as the desome other manner.

and anchoring means looking from the interior of the shuttle box;

Figure 5 is a transverse sectional view taken along the line 5-5 in Figure i.

Referring more specifically to the drawing, th '5 numeral indicates the lay of a loom having a race plate ll, back binder l2 and a box front [3. A space is provided between the binder and box front for reception of a shuttle M. A picker stick I5 having a picker l6 thereon is also provided. The structure shown in the drawing and described above is conventional, except as to the box front and a detailed description of the same will now be given.

A thread cutter for clamping and cutting the thread on a bobbin which is being expelled from the shuttle in a transfer operation enters through a slot in the box front and through a slot in the shuttle to engage and clamp a thread from the outgoing bobbin. This clamped thread is withdrawn through the box front and by receding movement of the thread cutter and clamp, and has been passed over the top of the box front in the patent heretofore mentioned as well as in a structure shown in a patent to Burdette, No.

1,768,502, of January 24, 1930. On account of the fact that the selvedge of the cloth is. disposed in a horizontal plane passing through the bottom of the shuttle box, it is therefore seen that in withdrawing the clamped thread over the top of the shuttle box that the same is stretched and defective weaving in thus produced.

My box front l3 has a suitable lining such as leather 20 and is provided with a slot 2| through which the thread cutter may pass. The thread. 3 cutter also passes through a slot 22 in the shuttle (Figure 1) to engage the yarn from the outgoing bobbin and to withdraw the same through the slot in the box front. The box front has an upper or anchoring portion 23, and a lower, shorter portion 24, by means of a slot 25 extending inwardly and downwardly toward the selvedge of the cloth being woven. It is seen that the upper or anchor member 23, at its inner end is disposed a substantial distance above the race plate ll forming a slot 26 which is a continuation of slot 25. The box front is secured to the race plate at one end in a conventional manner by means of a bolt 21. Instead of having a bolt at its other end penetrating the race plate in the conventional manner, means must be provided for supporting the upper or anchoring member 23 at its inner end in This means comprises an irregularly curved bolt 28 which is secured to the inner end of the anchoring member 23 and projects upwardly and towards the observer in Figure 1, forming a loop 29 in order to provide plenty of room for the weaving operation, and to prevent the entanglement of any loose yarn. The member 28 then projects laterally away from the observer in Figure 1 and bridges the gap between the box front and the binder a substantial distance above the path travelled by the shuttle (see Figure 3). The free end of bolt 28 is threaded and is secured to the upper end of an upstanding support 3!) which has its lower end secured to the lay of the loom by any suitable means such as a bolt 3! penetrating a hole 32 in member 30 and being threadably embedded in the lay of the loom.

This peculiarly shaped bolt 28 securely anchors the inner end of the box front so as to resist the lateral thrust of an incoming shuttle, and at the same time holds the inner end of the box front in spaced relation to the race plate to provide a slot through which the thread from the outgoing bobbin may be withdrawn and held by the thread cutter.

It is to be noted that shuttle I l has a conventional groove Ma therein, preventing binding of the thread so that when the thread on an out going bobbin is clamped and parted, as the shut tle is expelled from the shuttle box by means of the picker 16, the thread end will remain and will be withdrawn downwardly through slots 25 and 26.

It is to be noted in Figure 1 that the shuttle is shown in a position where it is not completely boxed, as it would still move to the right in Figure 1 a substantial distance before being fully checked by the picker, the picker stick, the friction imparted to the sides of the shuttle by the box front lining, and the binder. When the shuttle is fully boxed then slot 22 in the side of the shuttle will coincide with slot 2! in the box front so as to allow a suitable thread cutter and clamp to pass through said slots 2! and 22 to engage the filling on the bobbin about to be transferred.

Throughout the specification and claims, I have used the terms .inwardly and outwardly and inner and outer. The meaning of these terms is that commonly understood in weaving, as the inner end of the shuttle box is that portion disposed near the selvedge of the cloth and the outer end of the shuttle box is that end in which the picker comes to rest after boxing a shuttle.

In the drawing and specification there has been set forth a preferred embodiment of the invention and although specific terms are employed, they are used in a generic and descriptive sense only and not for the purposes of limitation, the scope of the invention being set forth in the appended claims.

I claim:

1. A shuttle box for looms having a box front provided with an open-ended thread slot extending downwardly and inwardly along the lower edge of the box front and dividing the box front into an upper anchoring member anchored at its inner end by means secured to the inner end and extending over the top of the shuttle box, and having a shorter member disposed below said slot and anchored at the outer end of the shuttle box.

2. A shuttle box for looms having a box front provided with an open-ended thread slot extending downwardly and inwardly below the thread groove in a boxed shuttle, and dividing the box front into an upper anchoring member and a shorter lower member, means for securing the outer end of the box front to the lay of the loom, and means connected to the inner end of the upper anchoring member and extending upwardly and over the shuttle box and being secured to the lay of the loom on the side of the shuttle box remote from the box front.

3. A box front for a shuttle box provided with an inwardly and downwardly extending slot open at its inner end, a rigid anchoring member disposed above said slot to take the first impacts of the shuttle as it enters the shuttle box, means for securing the inner end of the anchoring member to the lay of the loom on the other side of the shuttle box and a lower member shorter than the anchoring member disposed below said slot and supported at the outer end of the anchoring member beyond the outer end of the slot.

4. A box front for a shuttle box having a slot extending from near the outer end of the box front inwardly and downwardly uninterruptedly the full extent of the inner portion of the box front and dividing the box front into an upper anchoring member and a shorter lower mem ber integral at its outer end with the outer end of the anchoring member to provide a clear thread passage and means secured to the inner end of the anchoring member for supporting said inner end, in a fixed position.

HENRY JONES LANIER. 

